Concentration is a cornerstone of mindfulness practice. Your mindfulness will only be as robust as the capacity of your mind to be calm and stable. Without calmness, the mirror of mindfulness will have an agitated and choppy surface and will not be able to reflect things with any accuracy.
Jon Kabat-ZinnThis is something called "walking meditation." The goal is to learn to be aware of each and every movement and feeling. I know it seems ridiculous, but it does change the way you experience walking.
Jon Kabat-ZinnWe must be willing to encounter darkness and despair when they come up and face them, over and over again if need be, without running away or numbing ourselves in the thousands of ways we conjure up to avoid the unavoidable.
Jon Kabat-Zinn